721 lines
25 KiB
C#
Executable File
721 lines
25 KiB
C#
Executable File
/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSimulator Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Xml;
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using System.Collections;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Reflection;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Threading;
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using System.Timers;
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using OpenMetaverse;
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using Nini.Config;
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using OpenSim.Framework.Servers.HttpServer;
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using log4net;
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namespace OpenSim.Framework.Console
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{
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// A console that uses REST interfaces
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//
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public class RemoteConsole : CommandConsole
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{
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// Connection specific data, indexed by a session ID
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// we create when a client connects.
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protected class ConsoleConnection
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{
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// Last activity from the client
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public int last;
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// Last line of scrollback posted to this client
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public long lastLineSeen;
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// True if this is a new connection, e.g. has never
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// displayed a prompt to the user.
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public bool newConnection = true;
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}
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// A line in the scrollback buffer.
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protected class ScrollbackEntry
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{
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// The line number of this entry
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public long lineNumber;
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// The text to send to the client
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public string text;
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// The level this should be logged as. Omitted for
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// prompts and input echo.
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public string level;
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// True if the text above is a prompt, e.g. the
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// client should turn on the cursor / accept input
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public bool isPrompt;
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// True if the requested input is a command. A
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// client may offer help or validate input if
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// this is set. If false, input should be sent
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// as typed.
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public bool isCommand;
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// True if this text represents a line of text that
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// was input in response to a prompt. A client should
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// turn off the cursor and refrain from sending commands
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// until a new prompt is received.
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public bool isInput;
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}
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// Data that is relevant to all connections
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// The scrollback buffer
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protected List<ScrollbackEntry> m_Scrollback = new List<ScrollbackEntry>();
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// Monotonously incrementing line number. This may eventually
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// wrap. No provision is made for that case because 64 bits
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// is a long, long time.
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protected long m_lineNumber = 0;
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// These two variables allow us to send the correct
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// information about the prompt status to the client,
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// irrespective of what may have run off the top of the
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// scrollback buffer;
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protected bool m_expectingInput = false;
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protected bool m_expectingCommand = true;
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protected string m_lastPromptUsed;
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// This is the list of things received from clients.
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// Note: Race conditions can happen. If a client sends
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// something while nothing is expected, it will be
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// intepreted as input to the next prompt. For
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// commands this is largely correct. For other prompts,
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// YMMV.
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// TODO: Find a better way to fix this
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protected List<string> m_InputData = new List<string>();
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// Event to allow ReadLine to wait synchronously even though
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// everthing else is asynchronous here.
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protected ManualResetEvent m_DataEvent = new ManualResetEvent(false);
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// The list of sessions we maintain. Unlike other console types,
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// multiple users on the same console are explicitly allowed.
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protected Dictionary<UUID, ConsoleConnection> m_Connections =
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new Dictionary<UUID, ConsoleConnection>();
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// Timer to control expiration of sessions that have been
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// disconnected.
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protected System.Timers.Timer m_expireTimer = new System.Timers.Timer(5000);
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// The less interesting stuff that makes the actual server
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// work.
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protected IHttpServer m_Server = null;
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protected IConfigSource m_Config = null;
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protected string m_UserName = String.Empty;
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protected string m_Password = String.Empty;
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protected string m_AllowedOrigin = String.Empty;
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public RemoteConsole(string defaultPrompt) : base(defaultPrompt)
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{
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// There is something wrong with this architecture.
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// A prompt is sent on every single input, so why have this?
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// TODO: Investigate and fix.
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m_lastPromptUsed = defaultPrompt;
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// Start expiration of sesssions.
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m_expireTimer.Elapsed += DoExpire;
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m_expireTimer.Start();
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}
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public void ReadConfig(IConfigSource config)
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{
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m_Config = config;
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// We're pulling this from the 'Network' section for legacy
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// compatibility. However, this is so essentially insecure
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// that TLS and client certs should be used instead of
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// a username / password.
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IConfig netConfig = m_Config.Configs["Network"];
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if (netConfig == null)
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return;
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// Get the username and password.
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m_UserName = netConfig.GetString("ConsoleUser", String.Empty);
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m_Password = netConfig.GetString("ConsolePass", String.Empty);
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// Woefully underdocumented, this is what makes javascript
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// console clients work. Set to "*" for anywhere or (better)
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// to specific addresses.
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m_AllowedOrigin = netConfig.GetString("ConsoleAllowedOrigin", String.Empty);
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}
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public void SetServer(IHttpServer server)
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{
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// This is called by the framework to give us the server
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// instance (means: port) to work with.
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m_Server = server;
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// Add our handlers
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m_Server.AddHTTPHandler("/StartSession/", HandleHttpStartSession);
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m_Server.AddHTTPHandler("/CloseSession/", HandleHttpCloseSession);
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m_Server.AddHTTPHandler("/SessionCommand/", HandleHttpSessionCommand);
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}
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public override void Output(string format, string level = null, params object[] components)
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{
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if (components.Length == 0)
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Output(format, level, false, false, false);
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else
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Output(String.Format(format, components), level, false, false, false);
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}
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protected void Output(string text, string level, bool isPrompt, bool isCommand, bool isInput)
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{
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if (level == null)
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level = String.Empty;
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// Increment the line number. It was 0 and they start at 1
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// so we need to pre-increment.
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m_lineNumber++;
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// Create and populate the new entry.
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ScrollbackEntry newEntry = new ScrollbackEntry();
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newEntry.lineNumber = m_lineNumber;
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newEntry.text = text;
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newEntry.level = level;
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newEntry.isPrompt = isPrompt;
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newEntry.isCommand = isCommand;
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newEntry.isInput = isInput;
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// Add a line to the scrollback. In some cases, that may not
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// actually be a line of text.
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lock (m_Scrollback)
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{
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// Prune the scrollback to the length se send as connect
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// burst to give the user some context.
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while (m_Scrollback.Count >= 1000)
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m_Scrollback.RemoveAt(0);
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m_Scrollback.Add(newEntry);
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}
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// Let the rest of the system know we have output something.
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FireOnOutput(text.Trim());
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// Also display it for debugging.
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System.Console.WriteLine(text.Trim());
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}
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public override string ReadLine(string p, bool isCommand, bool e)
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{
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// Output the prompt an prepare to wait. This
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// is called on a dedicated console thread and
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// needs to be synchronous. Old architecture but
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// not worth upgrading.
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if (isCommand)
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{
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m_expectingInput = true;
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m_expectingCommand = true;
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Output(p, String.Empty, true, true, false);
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m_lastPromptUsed = p;
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}
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else
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{
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m_expectingInput = true;
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Output(p, String.Empty, true, false, false);
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}
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// Here is where we wait for the user to input something.
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m_DataEvent.WaitOne();
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string cmdinput;
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// Check for empty input. Read input if not empty.
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lock (m_InputData)
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{
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if (m_InputData.Count == 0)
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{
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m_DataEvent.Reset();
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m_expectingInput = false;
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m_expectingCommand = false;
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return "";
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}
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cmdinput = m_InputData[0];
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m_InputData.RemoveAt(0);
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if (m_InputData.Count == 0)
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m_DataEvent.Reset();
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}
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m_expectingInput = false;
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m_expectingCommand = false;
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// Echo to all the other users what we have done. This
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// will also go to ourselves.
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Output (cmdinput, String.Empty, false, false, true);
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// If this is a command, we need to resolve and execute it.
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if (isCommand)
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{
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// This call will actually execute the command and create
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// any output associated with it. The core just gets an
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// empty string so it will call again immediately.
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string[] cmd = Commands.Resolve(Parser.Parse(cmdinput));
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if (cmd.Length != 0)
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{
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int i;
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for (i=0 ; i < cmd.Length ; i++)
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{
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if (cmd[i].Contains(" "))
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cmd[i] = "\"" + cmd[i] + "\"";
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}
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return String.Empty;
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}
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}
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// Return the raw input string if not a command.
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return cmdinput;
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}
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// Very simplistic static access control header.
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protected Hashtable CheckOrigin(Hashtable result)
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{
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if (!string.IsNullOrEmpty(m_AllowedOrigin))
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result["access_control_allow_origin"] = m_AllowedOrigin;
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return result;
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}
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/* TODO: Figure out how PollServiceHTTPHandler can access the request headers
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* in order to use m_AllowedOrigin as a regular expression
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protected Hashtable CheckOrigin(Hashtable headers, Hashtable result)
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{
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if (!string.IsNullOrEmpty(m_AllowedOrigin))
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{
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if (headers.ContainsKey("origin"))
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{
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string origin = headers["origin"].ToString();
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if (Regex.IsMatch(origin, m_AllowedOrigin))
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result["access_control_allow_origin"] = origin;
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}
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}
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return result;
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}
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*/
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protected void DoExpire(Object sender, ElapsedEventArgs e)
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{
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// Iterate the list of console connections and find those we
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// haven't heard from for longer then the longpoll interval.
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// Remove them.
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List<UUID> expired = new List<UUID>();
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lock (m_Connections)
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{
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// Mark the expired ones
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foreach (KeyValuePair<UUID, ConsoleConnection> kvp in m_Connections)
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{
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if (System.Environment.TickCount - kvp.Value.last > 500000)
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expired.Add(kvp.Key);
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}
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// Delete them
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foreach (UUID id in expired)
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{
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m_Connections.Remove(id);
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CloseConnection(id);
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}
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}
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}
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// Start a new session.
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protected Hashtable HandleHttpStartSession(Hashtable request)
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{
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// The login is in the form of a http form post
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Hashtable post = DecodePostString(request["body"].ToString());
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Hashtable reply = new Hashtable();
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reply["str_response_string"] = "";
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reply["int_response_code"] = 401;
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reply["content_type"] = "text/plain";
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// Check user name and password
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if (m_UserName == String.Empty)
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return reply;
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if (post["USER"] == null || post["PASS"] == null)
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return reply;
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if (m_UserName != post["USER"].ToString() ||
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m_Password != post["PASS"].ToString())
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{
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return reply;
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}
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// Set up the new console connection record
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ConsoleConnection c = new ConsoleConnection();
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c.last = System.Environment.TickCount;
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c.lastLineSeen = 0;
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// Assign session ID
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UUID sessionID = UUID.Random();
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// Add connection to list.
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lock (m_Connections)
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{
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m_Connections[sessionID] = c;
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}
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// This call is a CAP. The URL is the authentication.
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string uri = "/ReadResponses/" + sessionID.ToString() + "/";
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m_Server.AddPollServiceHTTPHandler(
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uri, new PollServiceEventArgs(null, uri, HasEvents, GetEvents, NoEvents, null, sessionID,25000)); // 25 secs timeout
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// Our reply is an XML document.
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// TODO: Change this to Linq.Xml
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XmlDocument xmldoc = new XmlDocument();
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XmlNode xmlnode = xmldoc.CreateNode(XmlNodeType.XmlDeclaration,
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"", "");
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xmldoc.AppendChild(xmlnode);
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XmlElement rootElement = xmldoc.CreateElement("", "ConsoleSession",
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"");
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xmldoc.AppendChild(rootElement);
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XmlElement id = xmldoc.CreateElement("", "SessionID", "");
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id.AppendChild(xmldoc.CreateTextNode(sessionID.ToString()));
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rootElement.AppendChild(id);
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XmlElement prompt = xmldoc.CreateElement("", "Prompt", "");
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prompt.AppendChild(xmldoc.CreateTextNode(m_lastPromptUsed));
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rootElement.AppendChild(prompt);
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rootElement.AppendChild(MainConsole.Instance.Commands.GetXml(xmldoc));
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// Set up the response and check origin
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reply["str_response_string"] = xmldoc.InnerXml;
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reply["int_response_code"] = 200;
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reply["content_type"] = "text/xml";
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reply = CheckOrigin(reply);
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return reply;
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}
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// Client closes session. Clean up.
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protected Hashtable HandleHttpCloseSession(Hashtable request)
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{
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Hashtable post = DecodePostString(request["body"].ToString());
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Hashtable reply = new Hashtable();
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reply["str_response_string"] = "";
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reply["int_response_code"] = 404;
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reply["content_type"] = "text/plain";
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if (post["ID"] == null)
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return reply;
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UUID id;
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if (!UUID.TryParse(post["ID"].ToString(), out id))
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return reply;
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lock (m_Connections)
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{
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if (m_Connections.ContainsKey(id))
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{
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m_Connections.Remove(id);
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CloseConnection(id);
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}
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}
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XmlDocument xmldoc = new XmlDocument();
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XmlNode xmlnode = xmldoc.CreateNode(XmlNodeType.XmlDeclaration,
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"", "");
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xmldoc.AppendChild(xmlnode);
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XmlElement rootElement = xmldoc.CreateElement("", "ConsoleSession",
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"");
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xmldoc.AppendChild(rootElement);
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XmlElement res = xmldoc.CreateElement("", "Result", "");
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res.AppendChild(xmldoc.CreateTextNode("OK"));
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rootElement.AppendChild(res);
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reply["str_response_string"] = xmldoc.InnerXml;
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reply["int_response_code"] = 200;
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reply["content_type"] = "text/xml";
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reply = CheckOrigin(reply);
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return reply;
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}
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// Command received from the client.
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protected Hashtable HandleHttpSessionCommand(Hashtable request)
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{
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Hashtable post = DecodePostString(request["body"].ToString());
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Hashtable reply = new Hashtable();
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reply["str_response_string"] = "";
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reply["int_response_code"] = 404;
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reply["content_type"] = "text/plain";
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// Check the ID
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if (post["ID"] == null)
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return reply;
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UUID id;
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if (!UUID.TryParse(post["ID"].ToString(), out id))
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return reply;
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// Find the connection for that ID.
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lock (m_Connections)
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{
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if (!m_Connections.ContainsKey(id))
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return reply;
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}
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// Empty post. Just error out.
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if (post["COMMAND"] == null)
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return reply;
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// Place the input data in the buffer.
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lock (m_InputData)
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{
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m_DataEvent.Set();
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m_InputData.Add(post["COMMAND"].ToString());
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}
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// Create the XML reply document.
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XmlDocument xmldoc = new XmlDocument();
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XmlNode xmlnode = xmldoc.CreateNode(XmlNodeType.XmlDeclaration,
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"", "");
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xmldoc.AppendChild(xmlnode);
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XmlElement rootElement = xmldoc.CreateElement("", "ConsoleSession",
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"");
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xmldoc.AppendChild(rootElement);
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XmlElement res = xmldoc.CreateElement("", "Result", "");
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res.AppendChild(xmldoc.CreateTextNode("OK"));
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rootElement.AppendChild(res);
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reply["str_response_string"] = xmldoc.InnerXml;
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reply["int_response_code"] = 200;
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reply["content_type"] = "text/xml";
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reply = CheckOrigin(reply);
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return reply;
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}
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// Decode a HTTP form post to a Hashtable
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protected Hashtable DecodePostString(string data)
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{
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Hashtable result = new Hashtable();
|
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string[] terms = data.Split(new char[] {'&'});
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|
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foreach (string term in terms)
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{
|
|
string[] elems = term.Split(new char[] {'='});
|
|
if (elems.Length == 0)
|
|
continue;
|
|
|
|
string name = System.Web.HttpUtility.UrlDecode(elems[0]);
|
|
string value = String.Empty;
|
|
|
|
if (elems.Length > 1)
|
|
value = System.Web.HttpUtility.UrlDecode(elems[1]);
|
|
|
|
result[name] = value;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
// Close the CAP receiver for the responses for a given client.
|
|
public void CloseConnection(UUID id)
|
|
{
|
|
try
|
|
{
|
|
string uri = "/ReadResponses/" + id.ToString() + "/";
|
|
|
|
m_Server.RemovePollServiceHTTPHandler("", uri);
|
|
}
|
|
catch (Exception)
|
|
{
|
|
}
|
|
}
|
|
|
|
// Check if there is anything to send. Return true if this client has
|
|
// lines pending.
|
|
protected bool HasEvents(UUID RequestID, UUID sessionID)
|
|
{
|
|
ConsoleConnection c = null;
|
|
|
|
lock (m_Connections)
|
|
{
|
|
if (!m_Connections.ContainsKey(sessionID))
|
|
return false;
|
|
c = m_Connections[sessionID];
|
|
}
|
|
c.last = System.Environment.TickCount;
|
|
if (c.lastLineSeen < m_lineNumber)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
// Send all pending output to the client.
|
|
protected Hashtable GetEvents(UUID RequestID, UUID sessionID)
|
|
{
|
|
// Find the connection that goes with this client.
|
|
ConsoleConnection c = null;
|
|
|
|
lock (m_Connections)
|
|
{
|
|
if (!m_Connections.ContainsKey(sessionID))
|
|
return NoEvents(RequestID, UUID.Zero);
|
|
c = m_Connections[sessionID];
|
|
}
|
|
|
|
// If we have nothing to send, send the no events response.
|
|
c.last = System.Environment.TickCount;
|
|
if (c.lastLineSeen >= m_lineNumber)
|
|
return NoEvents(RequestID, UUID.Zero);
|
|
|
|
Hashtable result = new Hashtable();
|
|
|
|
// Create the response document.
|
|
XmlDocument xmldoc = new XmlDocument();
|
|
XmlNode xmlnode = xmldoc.CreateNode(XmlNodeType.XmlDeclaration,
|
|
"", "");
|
|
|
|
xmldoc.AppendChild(xmlnode);
|
|
XmlElement rootElement = xmldoc.CreateElement("", "ConsoleSession",
|
|
"");
|
|
|
|
//if (c.newConnection)
|
|
//{
|
|
// c.newConnection = false;
|
|
// Output("+++" + DefaultPrompt);
|
|
//}
|
|
|
|
lock (m_Scrollback)
|
|
{
|
|
long startLine = m_lineNumber - m_Scrollback.Count;
|
|
long sendStart = startLine;
|
|
if (sendStart < c.lastLineSeen)
|
|
sendStart = c.lastLineSeen;
|
|
|
|
for (long i = sendStart ; i < m_lineNumber ; i++)
|
|
{
|
|
ScrollbackEntry e = m_Scrollback[(int)(i - startLine)];
|
|
|
|
XmlElement res = xmldoc.CreateElement("", "Line", "");
|
|
res.SetAttribute("Number", e.lineNumber.ToString());
|
|
res.SetAttribute("Level", e.level);
|
|
// Don't include these for the scrollback, we'll send the
|
|
// real state later.
|
|
if (!c.newConnection)
|
|
{
|
|
res.SetAttribute("Prompt", e.isPrompt ? "true" : "false");
|
|
res.SetAttribute("Command", e.isCommand ? "true" : "false");
|
|
res.SetAttribute("Input", e.isInput ? "true" : "false");
|
|
}
|
|
else if (i == m_lineNumber - 1) // Last line for a new connection
|
|
{
|
|
res.SetAttribute("Prompt", m_expectingInput ? "true" : "false");
|
|
res.SetAttribute("Command", m_expectingCommand ? "true" : "false");
|
|
res.SetAttribute("Input", (!m_expectingInput) ? "true" : "false");
|
|
}
|
|
else
|
|
{
|
|
res.SetAttribute("Input", e.isInput ? "true" : "false");
|
|
}
|
|
|
|
res.AppendChild(xmldoc.CreateTextNode(e.text));
|
|
|
|
rootElement.AppendChild(res);
|
|
}
|
|
}
|
|
|
|
c.lastLineSeen = m_lineNumber;
|
|
c.newConnection = false;
|
|
|
|
xmldoc.AppendChild(rootElement);
|
|
|
|
result["str_response_string"] = xmldoc.InnerXml;
|
|
result["int_response_code"] = 200;
|
|
result["content_type"] = "application/xml";
|
|
result["keepalive"] = false;
|
|
result = CheckOrigin(result);
|
|
|
|
return result;
|
|
}
|
|
|
|
// This is really just a no-op. It generates what is sent
|
|
// to the client if the poll times out without any events.
|
|
protected Hashtable NoEvents(UUID RequestID, UUID id)
|
|
{
|
|
Hashtable result = new Hashtable();
|
|
|
|
XmlDocument xmldoc = new XmlDocument();
|
|
XmlNode xmlnode = xmldoc.CreateNode(XmlNodeType.XmlDeclaration,
|
|
"", "");
|
|
|
|
xmldoc.AppendChild(xmlnode);
|
|
XmlElement rootElement = xmldoc.CreateElement("", "ConsoleSession",
|
|
"");
|
|
|
|
xmldoc.AppendChild(rootElement);
|
|
|
|
result["str_response_string"] = xmldoc.InnerXml;
|
|
result["int_response_code"] = 200;
|
|
result["content_type"] = "text/xml";
|
|
result["keepalive"] = false;
|
|
result = CheckOrigin(result);
|
|
|
|
return result;
|
|
}
|
|
}
|
|
}
|